10 



in female rather strong, hand very large oblong oval, malleolate, exceeding in 

 length the 2 preceding joints combined, fingers about the length of the palm and 

 densely serrated inside. Chelipeds of male much more elongated, with the basal 

 joint exceedingly large, and the meral joint greatly elongated and narrow. Fos- 

 sorial legs in female longer than the chelipeds, and in male almost attaining the 

 length of the whole body, the carpus being greatly elongated. Ambulatory legs 

 ■narrow, and but scantily setiferous. Uropoda scarcely exceeding in length the 

 metasome, inner ramus 10-articulate, outer rather small and 3-articulate. Colour 

 a pure white. Length of female 4 mm., of male 5 mm. 



Remarks. — The present form was first recorded by the author under the 

 name of Apseudes anomalus. It certainly belongs, however, to the genus 

 Sjphyrapus subsequently established by Messrs. Norman and Stebbing. It is very 

 nearly allied to the arctic species, 8. serratus, described by the present author 

 from the Norwegian North Atlantic Expedition, but may be at once distinguished 

 by the fact that the epimera of the metasome are not, as in that species, 

 acutely produced, but are simple and rounded. 



Occurrence. — I have met with this form along the whole Norwegian 

 coast from the Christiania Fjord to Vadso. . In the great fjords especially, it 

 is often found in rather large numbers on a bottom consisting of muddy clay, 

 the depth ranging from 100 to 400 fathoms. It is accordingly, like the other 

 species of the genus, a true deep-water form, and resembles in habits the species 

 of the genus Apseudes. 



Distribution. — The Kara Sea (Hansen). 



Fam. 2. Tanaidae. 



Body sublinear, cylindric, scarcely attenuated behind. Cephalosome not 

 very broad, scarcely depressed, and having the front, as a rule, narrowly trun- 

 cated; ocular lobes sometimes well defined, sometimes obsolete. Free segments of 

 mesosome perfectly smooth, the middle ones being generally the longer; coxal 

 plates inconspicuous. Metasome comparatively short, but scarcely narrower than 

 the mesosome. Eyes present or wanting. Superior antennae issuing close together 

 from the frontal part, simple, in female comparatively short, conical and composed 

 of only 3 or 4 articulations, in male, as a rule, much more fully developed, 

 with a well-defined, multiarticulate flagellum. Inferior antennae generally smaller 



